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227 lines
5.2 KiB
Perl
Executable File
227 lines
5.2 KiB
Perl
Executable File
# NOTE: this file tests how large files (>2GB) work with perlio (stdio/sfio).
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# sysopen(), sysseek(), syswrite(), sysread() are tested in t/lib/syslfs.t.
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# If you modify/add tests here, remember to update also t/lib/syslfs.t.
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BEGIN {
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chdir 't' if -d 't';
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unshift @INC, '../lib';
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# Don't bother if there are no quad offsets.
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require Config; import Config;
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if ($Config{lseeksize} < 8) {
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print "1..0\n# no 64-bit file offsets\n";
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exit(0);
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}
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}
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sub zap {
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close(BIG);
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unlink("big");
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unlink("big1");
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unlink("big2");
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}
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sub bye {
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zap();
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exit(0);
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}
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sub explain {
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print <<EOM;
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#
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# If the lfs (large file support: large meaning larger than two gigabytes)
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# tests are skipped or fail, it may mean either that your process
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# (or process group) is not allowed to write large files (resource
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# limits) or that the file system you are running the tests on doesn't
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# let your user/group have large files (quota) or the filesystem simply
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# doesn't support large files. You may even need to reconfigure your kernel.
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# (This is all very operating system and site-dependent.)
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#
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# Perl may still be able to support large files, once you have
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# such a process, enough quota, and such a (file) system.
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#
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EOM
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}
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print "# checking whether we have sparse files...\n";
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# Known have-nots.
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if ($^O eq 'win32' || $^O eq 'vms') {
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print "1..0\n# no sparse files (because this is $^O) \n";
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bye();
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}
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# Known haves that have problems running this test
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# (for example because they do not support sparse files, like UNICOS)
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if ($^O eq 'unicos') {
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print "1..0\n# large files known to work but unable to test them here ($^O)\n";
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bye();
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}
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# Then try to heuristically deduce whether we have sparse files.
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# Let's not depend on Fcntl or any other extension.
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my ($SEEK_SET, $SEEK_CUR, $SEEK_END) = (0, 1, 2);
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# We'll start off by creating a one megabyte file which has
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# only three "true" bytes. If we have sparseness, we should
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# consume less blocks than one megabyte (assuming nobody has
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# one megabyte blocks...)
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open(BIG, ">big1") or
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do { warn "open big1 failed: $!\n"; bye };
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binmode(BIG) or
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do { warn "binmode big1 failed: $!\n"; bye };
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seek(BIG, 1_000_000, $SEEK_SET) or
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do { warn "seek big1 failed: $!\n"; bye };
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print BIG "big" or
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do { warn "print big1 failed: $!\n"; bye };
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close(BIG) or
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do { warn "close big1 failed: $!\n"; bye };
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my @s1 = stat("big1");
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print "# s1 = @s1\n";
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open(BIG, ">big2") or
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do { warn "open big2 failed: $!\n"; bye };
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binmode(BIG) or
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do { warn "binmode big2 failed: $!\n"; bye };
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seek(BIG, 2_000_000, $SEEK_SET) or
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do { warn "seek big2 failed; $!\n"; bye };
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print BIG "big" or
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do { warn "print big2 failed; $!\n"; bye };
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close(BIG) or
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do { warn "close big2 failed; $!\n"; bye };
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my @s2 = stat("big2");
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print "# s2 = @s2\n";
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zap();
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unless ($s1[7] == 1_000_003 && $s2[7] == 2_000_003 &&
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$s1[11] == $s2[11] && $s1[12] == $s2[12]) {
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print "1..0\n#no sparse files?\n";
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bye;
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}
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print "# we seem to have sparse files...\n";
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# By now we better be sure that we do have sparse files:
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# if we are not, the following will hog 5 gigabytes of disk. Ooops.
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$ENV{LC_ALL} = "C";
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open(BIG, ">big") or do { warn "open failed: $!\n"; bye };
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binmode BIG;
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unless (seek(BIG, 5_000_000_000, $SEEK_SET)) {
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print "1..0\n# seeking past 2GB failed: $!\n";
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explain();
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bye();
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}
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# Either the print or (more likely, thanks to buffering) the close will
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# fail if there are are filesize limitations (process or fs).
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my $print = print BIG "big";
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print "# print failed: $!\n" unless $print;
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my $close = close BIG;
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print "# close failed: $!\n" unless $close;
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unless ($print && $close) {
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if ($! =~/too large/i) {
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print "1..0\n# writing past 2GB failed: process limits?\n";
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} elsif ($! =~ /quota/i) {
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print "1..0\n# filesystem quota limits?\n";
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}
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explain();
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bye();
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}
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@s = stat("big");
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print "# @s\n";
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unless ($s[7] == 5_000_000_003) {
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print "1..0\n# not configured to use large files?\n";
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explain();
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bye();
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}
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sub fail () {
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print "not ";
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$fail++;
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}
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print "1..17\n";
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my $fail = 0;
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fail unless $s[7] == 5_000_000_003; # exercizes pp_stat
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print "ok 1\n";
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fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize
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print "ok 2\n";
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fail unless -e "big";
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print "ok 3\n";
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fail unless -f "big";
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print "ok 4\n";
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open(BIG, "big") or do { warn "open failed: $!\n"; bye };
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binmode BIG;
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fail unless seek(BIG, 4_500_000_000, $SEEK_SET);
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print "ok 5\n";
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fail unless tell(BIG) == 4_500_000_000;
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print "ok 6\n";
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fail unless seek(BIG, 1, $SEEK_CUR);
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print "ok 7\n";
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fail unless tell(BIG) == 4_500_000_001;
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print "ok 8\n";
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fail unless seek(BIG, -1, $SEEK_CUR);
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print "ok 9\n";
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fail unless tell(BIG) == 4_500_000_000;
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print "ok 10\n";
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fail unless seek(BIG, -3, $SEEK_END);
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print "ok 11\n";
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fail unless tell(BIG) == 5_000_000_000;
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print "ok 12\n";
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my $big;
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fail unless read(BIG, $big, 3) == 3;
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print "ok 13\n";
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fail unless $big eq "big";
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print "ok 14\n";
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# 705_032_704 = (I32)5_000_000_000
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fail unless seek(BIG, 705_032_704, $SEEK_SET);
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print "ok 15\n";
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my $zero;
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fail unless read(BIG, $zero, 3) == 3;
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print "ok 16\n";
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fail unless $zero eq "\0\0\0";
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print "ok 17\n";
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explain if $fail;
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bye(); # does the necessary cleanup
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END {
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unlink "big"; # be paranoid about leaving 5 gig files lying around
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}
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# eof
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